<http://schema.org/description>
"The U.S. Social Security system acts as a giant safety net that provides financial help to retirees and younger people who have suffered a serious injury or illness. It also helps out the family members of those who have died or endured a disability."^^<http://www.w3.org/2001/XMLSchema#string>
<http://money.howstuffworks.com/personal-finance/personal-income-taxes/social-security-taxes1.htm>